Chevrolet officially rated the 1967 Corvette L88 at 430 horsepower — a number almost nobody believes, with real output reputed to be closer to 560 or even 600. Only 20 of the 22,940 Corvettes built that year carried the option, which required deleting the heater, radio, and air conditioning just to qualify. A Sunray DX-entered L88 went on to win the 12 Hours of Sebring outright that same year. Read on for how Chevrolet built the most powerful — and most deliberately hidden — engine it ever put under a Corvette hood.
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Chrysler built only 16 examples of a fuel-injected 392 Hemi for the 1958 300D, and 15 of them were quietly retrofitted back to carburetors within the same model year. That’s just one chapter in a decade where Chrysler’s FirePower Hemi and DeSoto’s own separate Hemi family kept leapfrogging each other in displacement and horsepower. Read on to find out how a 331-cubic-inch engine grew into some of the most powerful production V8s of the 1950s.
Clay and Sons Mopar recycling yard in rural Missouri hides more factory-original muscle than most private collections, and The Auto Archaeologist’s latest find proves it: a real 1968 GTX still wearing its original 426 Hemi and 4-speed. The yard behind it holds Darts, a Barracuda, and a yellow Coronet that have viewers calling it Mopar heaven in the comments. Watch to see what else is sitting in that field.
This 1968 Plymouth GTX convertible is one of 24 built, not 34, despite what the video’s own description claims elsewhere — and Mopar fans in the comments caught the contradiction. Under the hood, a 426 Hemi rated at 425 horsepower but built for NASCAR carries torque near 500 lb-ft, backed by a rear end reinforced specifically to survive it. One commenter even corrects the entire GTX-versus-Road-Runner origin story. So which details actually hold up?
Most Camaro buyers care about straight-line speed, but the ZL1 1LE was engineered for something different — carving corners on a road course, using suspension technology borrowed from actual race cars. Reviewer Brian Makse takes it through a full test with input from the Multimatic engineer behind its spool valve dampers. Watch to find out whether GM’s most track-focused Camaro trim lives up to the hardware underneath it.
Chevrolet’s internal rules banned any engine over 400 cubic inches in a 1969 Camaro, so dealer Don Yenko found a loophole using fleet paperwork meant for taxi cabs. That workaround produced the COPO 9561 and the ultra-rare 9560 ZL-1, an all-aluminum engine so labor-intensive that only 69 were ever ordered. Read on to find out how a $4,000 engine option ended up quietly outperforming its own factory horsepower rating.
POWERNATION’s Detroit Muscle crew takes on Project Ultra Violet, a 1970 Dodge Challenger so rusted it needs sandblasting before the real work can even begin. What follows is a uni-body-to-full-frame conversion built around a Jeff Schwartz G-Machine chassis and a low-deck, all-aluminum Hemi backed by a T56 six-speed. This is not a preserved survivor — it’s a genuine rust-bucket resurrection. Watch to see how far the team pushes it.
